- 作者: M. Jaffar; M. Ashraf
- 作者服務機構: Department of Chemistry, Quaid-i-Azam University, Islamabad (Pakistan)
- 中文摘要: A diphenylthiocarbazone (dithizone) based liquid-liquid extraction method of general utility is proposed for small-scale Hg(II) extraction from natural waters. The quantitative aspects related to the extraction are studied in terms of distribution ofmercury dithizonate in carbon tetrachloride-water system at 293K (20.plmin.1.degree.C). Various distribution constants related to the reagent and the complex formed are evaluated. The equilibrium and kinetic studies of extraction and complex formation are analytically based on atomic absorption and colorimetric methods. Local natural waters were subjected to the proposed method for Hg(II) removal. The method is found to be capable of removing above 98% mercury in a single-step extraction under the conditions evaluated in terms of matrix pH, equilibrium time and amount of reagent.
- 英文摘要: --
- 中文關鍵字: Hg(II) extraction; dithizone extration of Hg(II); Hg(II) extraction from natural waters.
- 英文關鍵字: Hg(II) extraction; dithizone extration of Hg(II); Hg(II) extraction from natural waters.